43. If you see a rainbow during rainy weather, it shows that the weather will clear up and become fine. This is because ______.

A. there is much water-vapour in the air     B. there is not much water-vapour in the air

C. there is not any water-vapour in the air    D. there are all kinds of water-vapour in the air

C

­Every human being has a unique (惟一的) arrangement of the skin on his fingers and this arrangement is unchangeable. Scientists and experts have proved the uniqueness of finger-prints and discovered that no exactly similar pattern is passed on from parents to children, though nobody knows why this is the case.

The ridge (脊状) structure on a person's fingers does not change with growth and is not affected by surface injuries. Burns, cuts and other damage to the outer part of the skin will be replaced in time by new one which bears a reproduction of the original pattern. It is only when the inner skin is injured that the arrangement will be destroyed. Some criminals make use of this fact to remove their own finger-prints but this is a dangerous and rare step to take.

Finger-prints can be made very easily with printer's ink. They can by recorded easily. With special methods, identification (识别)can be achieved successfully within a short time. Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal case. A suspected man may deny a charge but this may be in vain. His finger-prints can prove who he is even if his appearance has been changed by age or accident.

When a suspect leaves finger-prints behind at the scene of a crime, they are difficult to detect with the naked eye. Special techniques are used to “print” them. Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained.

39. From the story Balzac told we know that the wife's lover must have become ______.

A. a corpse        B. a phrase        C. a skeleton       D. a secret

B

Not only farmers but scientists have studied weather forecasting(预报).People, for many centuries and in all countries, have studied the weather and tried to make weather forecasts. Sometimes distant objects such as hills and tall trees seem to be very clear and near. This is a sign of much water-vapour in the air, and therefore a rain will probably come.

When distant sounds (such as the noise from a train, birds singing, or people shouting ) are very clearly heard, then wet and stormy weather is on the way.

Rings round the sun are a sign of coming rain.

Many people feel the coming of wet weather in their bones. Their joint aches. Some birds fly high if fine weather is coming, but they fly very near the ground if rainy weather or a storm is on the way. This is probably because the insects, which they are hunting, fly low at that time. If you see a rainbow during rainy weather, this is a sign that the weather will clear up and become fine. Such rainbows come in the evening. If the stars twinkle clearly at night, fine weather will continue. If a mist appears in the early morning, just about sunrise, the day will be warm.

If the sunset is mostly red in color, the following day will be fine. When big cumulous clouds(积云) appear at sunset, the bad weather will follow the next day.

If cirrus clouds(卷云) remain quite still, fine weather will come. If a rainbow appears in the morning, then rainy weather will probably come. Most of the above sayings have been made up by people who have used their eyes and their brains to forecast the weather.

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